In recent years there's been something of an explosion in artists doing alternative versions of posters for popular films. Mondo, the gallery arm of the Austin-based Alamo Drafthouse theaters, is one of the better known producers of these variations-on-a-theme, but there are many others taking part, including many artists doing their own takes just for fun.

Shortlist.com is having a "pick your favorite" contest and have put together their favorite 20 posters to vote on. They're really a lot of fun: take a look!